Strainer



July 3, 1928.

D. R. MCNEAL STRAINER Filed Feb. 15, 1924 3 Sheets-Sheet 1 Z; y .MJ

[N VENTO? Whw MW ORNE K5' l ATT July 3, 1928.

D. R. MCNEAL STRAINER :s sheets-sheet 2 Filed Feb. 13, 1924 a INVENTOR l flk MW /1 TTORNEY5 D. R. MCNEAL July 3, 192s.

STRAINER Filed Feb. 15, 1924 3 Sheets-Sheet LJW - ATTORNEYS il (l lli ill

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, ccssiblc locations.

Patented J uly 3, 1928.

UNITED vs'rAnezs PATENT OFFICE. l

nANIEL RAYMOND MCNEAL, E PALMYRA, NEW JERSEY, AssIeNon To ANIJALE ENeI-` Y NEERING COMPANY, A CORPORATION 0E `PENNSYLVANIA.

,1. s'rRAINER.

"Application mea February 13,1924. serial No. 692,458.

,This invention relates to strainers and is particularly useful in `that type of strainer known as a duplexstraner in which the fluid to be strained may be passed through eitherI strainer when it is desired to remove the other strainer for cleaning purposes.

One of the primary objects of my invention is to produce a simple, compact and sturdy construction, comparatively f inexpensive to manufacture and occupying a minimum of space. Another object of the invention is to provide a construction of strainer such that the machining operations` may begreatly simplified,` and the "cost thus cheapened.

A lurther objecthas to do with the provision ot an arrangement of parts such that the position of the valve or valves may be determinml from` the eXteriorat a glance. Still another object of the Vinvention is to provide an arrangement of the valve such that the parts may beinterchanged or reversed makingit possibleto install the strainer in what would lotherwise be inac- My invention further contemplates an arrangement and disposition `of parts such that the body or casing forming the' valve chambers and the strainer chambers may be cast in onepiece.

The foregoing, together With such other objects as may hereinafter appear, or are incident to my invention, I obtain by means ol a construction, the preferred embodiments oi" which are illustrated in the accompanying drawings wherein K Fig. 1 is a section thru the strainer taken on the line 1--1 of Fig. 2;

Fig. 2 is a section taken on the line 2-2 of Fig. l;

Fig. 3 is a section taken on the line 3-3 of Fig. 1

Fig. l is a section illustrating a detail ot the construction.

Referring now to i Fig. 1 the reference character A designates the casing or body o'li the strainer, such lcasing having opposed, aligned, flanged inlet and outlet portions 7 and 8 respectively, for` attachment in the line. The casing has two cylindrical portions 9 and 10,`a central division wall 11, and two spaced division walls 12 and 13, providing two valve chambers, B and C, and two strainer chambers D and E. The

cylindrical.,` portions 9 and 10 merge with the Walls 12 and 13 at the middle portion of the latter, and the wall 1l merges with the walls 12 andl-B at about their middle portion.` Each wall 12 and 13has two port opens ings 15 and 1G and 17 and 18. The cylindrical portionl 1() has an inlet port 19 establishmg communication between one end ofthe valve chamber B and the interior of such cylindrical or strainer chamber; and the cylindrical portion 9 has a similar port "open- .ing establishing communication between the opposite end of the valve chamber B and the interior of such cylindrical or strainer chamber. Each of the cylindrical por tions 9 and 10vis` provided with an outlet port, 2l and22, respectively leading into opposite ends ot' the valve chamber C.

It will be observed from the foregoing that the strainer chambers are between the valve chambers and extend at right angles to the median plane of `the device indicated bythe line 1 1 of Fig. 2. Heretoforein devices of this character it has been custo-` mary j to arrange the strainer chambers on" longitudinally thereof` and communicating with each valve chamber on each side. By the present arrangementa much more compact, simple and effective construction is secured having the advantage, among `other things, of' making it possible to cast the entire body in one piece.

,The portion .of thek casing forming theM outer Wall of the valve chambers is rounded, as the result of which there is no Hat un` stayed surface, which is an additional feature of advantage particularly where the pressures employed are high, as maximum strength is secured with a minimum weight of metal.

The valves 23 and 24 are double faced, the former being adaptedto seat either on the valve seat 12u or the valve seat 13, while the latter is adapted to seat either on the valve seat 16" or 18a.

The valves are carried on shouldered valve stems 25, and are clamped between the shoulders and the nuts 26` The end 25 of each valve stem is slidably received in the rear bearing 27, for the reception of which the casing is provided with the apertured seat portion 28, the surfaces'29 and 30 of which are machined.

The opposite end of each valve stemV is `slidable in thegland bearing 31, for the reception of which the 'casing is provided with the apertured seat portion 32 having machined surfaces 33 and 34. The bearings 27 and 3l are secured to the casing by screws.

The ends 25In of the valve stern extend through the gland bearing Vvvell tothe VeX- terior of the strainer easing or body and are threaded.

Thevalve stems are moved longitudinally by means Vof the nut 35 carried in theyoke 3 6 `Which in turn is carried bya pair of studs'. 2X hand Wheel 38 is itted toa square. portion of the nut 35 and held in place by means of the nut 391Which also serves to position the nut 35 With respect to the fixedyoke 36, so 'that while the nut 35 is free'tov be rotated, it cannot bei displaced longitudinally, as a result of which when it is turned,1t imparts longitudinal movement tothe valve stem.

By having'the valve stems project to the exterior and by having the valves fixed with respect to the valve stems so that movement is Aimparted thereto by longitudinal movement of the Vvalve stems, the position of the valves is Iimmediately indicated by the position of the projecting ends oijthe valve stem and-one is immediately appraised not only -astothe'p'osition of the lvalve butalso AWhether -or not there is any obstruction tending to prevent the valve from -being properl Hse'ated. p

rvThe earings -27 1andBl are interchangeable, so l that `Vitis :possible to insert the valve stein either fend tov-By virtuefof this arrangement, if the deviceisnot capable of being installed with theiends of the valve stems projecting from one side, they may beV reversedl so= as to project from rthe other side. This is a feature of'considerable imo'rtanee for very frquently the -strainers liave'ltobe installed-in 'relatively inaccessible i places.

The `straimers l"are sliliably supported in the Vstrainer chambers in the manner indicatedin Fig. l and are introduced and removed through the open end 42 of the "strainer chambers, such open end being closed by the-hinged,p.parcuate.lid or cover 453 releasably clampedin positionbymeans ofthe clamping device 44,'the construction and operation of 'which willbe readily `understood, y

reference -to `F ig. 4, 'it will be seen thatthe studs 37 are surrounded-by Isleeves 3T, such sleeves serving 'to space ythe Ayoke 36 with reference to the strainer body.

I claim:

l. In a strainer, a strainer'body having-avalve chamber, .a valve, a. valvestem carrying the valveintermediate t-he lends of the stem, a pair of 'bearing members yfor 'the endsof the stem interchangeably carried on thebody vvhereby the stem` may bereversed end for end, and means 'for manually shiftingsaid valve into one position or-another.

2. 'In a strainer, a strainer body having a valve chamber, a valve, a valve stem carrying the valve intermediate the ends of the stem and a pairoflbearing members for the ends of the stem :interchangeably carried on the body whereby Athefstem maybe-reversed end Afor end, an end of the stem projecting exteriorly of the body.

3. In a duplex strainer, a body having t\vo valve chambers, each having two spaced valve seats, a .double faced valvefor each chamber,'means for moving the valves, and a pair ofrcylindrical strainers located 'between said means for moving the valves, said. strainers being arranged Wit-h their longitudinal Aaxes lying in. a common plane separating .said valve chambers.

In testimony whereof, I fhave hereunto signed myiname.

D. RAYMOND AMCNEAL. 

